@article{MZM_2004_75_2_a16,
     author = {A. D.-O. Ukhlov},
     title = {Differential and {Geometric} {Properties} of {Sobolev} {Mappings}},
     journal = {Matemati\v{c}eskie zametki},
     pages = {317--320},
     year = {2004},
     volume = {75},
     number = {2},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_2004_75_2_a16/}
}